import axios from 'axios';
import {ElNotification, ElMessageBox, ElMessage, ElLoading} from 'element-plus';
import {saveAs} from 'file-saver';
import store from '@/store';
import {getToken} from '@/utils/token';
import errorCode from '@/utils/errorCode';
import {isBlobData} from '@/utils/common';
import {encodeURIParams} from '@/utils/strUtil';
import cache from '@/plugins/cache';

let downloadLoadingInstance;
// 是否显示重新登录
export const isReLogin = {show: false};

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8';
// 创建axios实例
const service = axios.create({
    // axios中请求配置有baseURL选项，表示请求URL公共部分
    baseURL: import.meta.env.VITE_APP_BASE_API,
    // 超时
    timeout: 30000,
});

// request拦截器
service.interceptors.request.use(
    (config) => {
        // 是否需要设置 token
        const isToken = (config.headers || {}).isToken === false;
        // 是否需要防止数据重复提交
        const isRepeatSubmit = (config.headers || {}).repeatSubmit === false;
        if (getToken() && !isToken) {
            config.headers.Authorization = `Bearer ${getToken()}`; // 让每个请求携带自定义token 请根据实际情况自行修改
        }
        // get请求映射params参数
        if (config.method === 'get' && config.params) {
            let url = `${config.url}?${encodeURIParams(config.params)}`;
            url = url.slice(0, -1);
            config.params = {};
            config.url = url;
        }
        if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
            const requestObj = {
                url: config.url,
                data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
                time: new Date().getTime(),
            };
            const sessionObj = cache.session.getJSON('sessionObj');
            if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
                cache.session.setJSON('sessionObj', requestObj);
            } else {
                const s_url = sessionObj.url; // 请求地址
                const s_data = sessionObj.data; // 请求数据
                const s_time = sessionObj.time; // 请求时间
                const interval = 1000; // 间隔时间(ms)，小于此时间视为重复提交
                if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
                    const message = '数据正在处理，请勿重复提交';
                    console.warn(`[${s_url}]: ${message}`);
                    return Promise.reject(new Error(message));
                }
                cache.session.setJSON('sessionObj', requestObj);
            }
        }
        return config;
    },
    (error) => {
        console.log(error);
        Promise.reject(error);
    },
);

// 响应拦截器
service.interceptors.response.use(
    (res) => {
        // 未设置状态码则默认成功状态
        const code = res.data.code || 200;
        // 获取错误信息
        const msg = errorCode[code] || res.data.msg || errorCode.default;
        // 二进制数据则直接返回
        if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
            return res.data;
        }
        if (code === 20101) {
            if (!isReLogin.show) {
                isReLogin.show = true;
                ElMessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', {
                    confirmButtonText: '重新登录',
                    cancelButtonText: '取消',
                    type: 'warning',
                })
                    .then(() => {
                        isReLogin.show = false;
                        store.dispatch('LogOut').then(() => {
                            location.href = '/index';
                        });
                    })
                    .catch(() => {
                        isReLogin.show = false;
                    });
            }
            return Promise.reject('无效的会话，或者会话已过期，请重新登录。');
        }
        if (code === 500) {
            ElMessage({
                message: msg,
                type: 'error',
            });
            return Promise.reject(new Error(msg));
        }
        if (code !== 200) {
            ElNotification.error({
                title: msg,
            });
            return Promise.reject('error');
        }
        return Promise.resolve(res.data.data);
    },
    (error) => {
        console.log(`err${error}`);
        let {message} = error;
        if (message == 'Network Error') {
            message = '后端接口连接异常';
        } else if (message.includes('timeout')) {
            message = '系统接口请求超时';
        } else if (message.includes('Request failed with status code')) {
            message = `系统接口${message.substr(message.length - 3)}异常`;
        }
        ElMessage({
            message,
            type: 'error',
            duration: 5 * 1000,
        });
        return Promise.reject(error);
    },
);

// 通用下载方法
export function download(url, params, filename) {
    downloadLoadingInstance = ElLoading.service({text: '正在下载数据，请稍候', background: 'rgba(0, 0, 0, 0.7)'});
    return service
        .post(url, params, {
            transformRequest: [(params) => encodeURIParams(params)],
            headers: {'Content-Type': 'application/x-www-form-urlencoded'},
            responseType: 'blob',
        })
        .then(async (data) => {
            const isLogin = await isBlobData(data);
            if (isLogin) {
                const blob = new Blob([data]);
                saveAs(blob, filename);
            } else {
                const resText = await data.text();
                const rspObj = JSON.parse(resText);
                const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode.default;
                ElMessage.error(errMsg);
            }
            downloadLoadingInstance.close();
        })
        .catch((r) => {
            console.error(r);
            ElMessage.error('下载文件出现错误，请联系管理员！');
            downloadLoadingInstance.close();
        });
}

export default service;
